SS6804BCSTB

SS6804 Three/Four-cell Lithium-Ion Battery Protection IC FEATURES Ultra-low quiescent current, 17µA (4-cell, Vcell = 3.5V). Ultra-low power-down current, 2.2µA (4-cell, Vcell = 2.3V). Wide supply voltage range: 2V to 18V. Precision over-charge protection voltage: 4.35V±30mV for the SS6804A 4.30V±30mV for the SS6804B 4.25V±30mV for the SS6804C 4.20V±30mV for the SS6804D Externally set over-charge, over-discharge and over-current delay time. Built-in cell-balancing bleeding network under over-charge condition. Three detection levels for over-current protection. DESCRIPTION The SS6804 is designed to protect a lithium-ion battery from damage or degraded lifetime due to over-charging, over-discharging and over-current for three- or four-cell lithium-ion battery powered systems such as notebook PCs. It provides the cell-balancing "bleeding" function to automatically discharge the over-charged cell until the over-charge condition is eliminated. Safe charging with full utilization is ensured by the accurate ±30mV over-charge detection. Four different specification values for over-charge protection voltage are provided for various protection requirements. The very low standby current represents little drain from the cell while in storage. APPLICATIONS Protection IC for three/four-cell lithium-ion battery packs. TYPICAL APPLICATION CIRCUIT R8 1K 1 16 NSL VCC R1 200 SSM4435M BAT1 M1 SSM4435M M2 R5 1M FUSE BATT+ C1 0.1µF 2 3 CS VC1 14 R2 C2 0.1µF 2K BAT2 4 OD 5 TD UD2 13 VC2 12 C3 0.1µF R3 2K BAT3 R7 1M 2N3906 Q1 OC UD1 15 R6 1M CTD 82nF CTI 2.2nF 6 TI 7 TC CTC 82nF 8 GND UD3 11 10 VC3 C4 UD4 9 R4 33K 0.1µF BAT4 SS6804 BATT- Protection Circuit for Four-Cell Lithium-Ion Battery Pack 12/29/2003 Rev.2.02 www.SiliconStandard.com 1 of 12 
SS6804 ORDERING INFORMATION SS6804XCXXX Packing type TR: Tape and reel TB: Tube Package type S: SO-16 Over-charge Protection Voltage A: 4.35V B: 4.30V C: 4.25V D: 4.20V Example: SS6804ACSTR $
4.35V version, in SO-16, shipped on tape and reel TOP VIEW PIN CONFIGURATION NSL 1 OC 2 CS 3 16 VCC 15 UD1 14 VC1 13 UD2 12 VC2 11 UD3 10 VC3 9 UD4 OD 4 TD TI TC 5 6 7 GND 8 ABSOLUTE MAXIMUM RATINGS !""#
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TEST CIRCUIT ROC 1M IOC S1 1 VOC R8 VCS 1K VOD 2 NSL OC UD1 15 3 4 CS OD UD2 5 TD 6 TI CTD 1nF UD3 11 CTI 2.2nF CTC 1nF 7 TC VC3 10 13 VC1 14 VCC 16 ICC R1 200 C1 0.1µF VCC IUD1 IC1 IUD2 IC2 C2 0.1µF R2 2K VC1 VC2 12 IUD3 IC3 R3 2K C3 0.1µF VC2 8 GND UD4 9 IUD4 R4 33K C4 0.1µF VC3 SS6804 12/29/2003 Rev.2.02 www.SiliconStandard.com 2 of 12
SS6804 ELECTRICAL CHARACTERISTICS PARAMETER (TA=25°C, unless otherwise specified.) SYMBOL TEST CONDITIONS MIN. TYP. 17 MAX. UNIT 26 µA µA µA µA µA µA VCC Pin Input Current in Normal VCELL=3.5V Mode VC1 Pin Input Current in Normal VCELL=3.5V Mode VC2 Pin Input Current in Normal VCELL=3.5V Mode VC3 Pin Input Current in Normal VCELL=3.5V Mode Vcc Pin Input Current in PowerDown Mode VC1,VC2,VC3 Input Current in Power-Down Mode VCELL=2.3V VCELL=2.3V SS6804A SS6804B Overcharge Protection Voltage SS6804C SS6804D Overcharge Hysteresis Voltage Overdischarge Protection Voltage Overdischarge Release Voltage Overcurrent Protection Voltage VCELL=3.5V VCELL1=VOCP - 30mV →VOCP+30mV VCELL2= VCELL3= VCELL4= 3.5V, CTC=1nF VCELL1= 2.5V→ 2.3V Overdischarge Delay Time VCELL2= VCELL3= VCELL4= 3.5V, CTD=1nF VCELL= 3.5V,0.15V